Roboguru

pH larutan  adalah... diketahui

pH larutan begin mathsize 14px style C H subscript 3 C O O Na space 0 comma 1 space M end style adalahundefined...

diketahui begin mathsize 14px style K subscript a space C H subscript 3 C O O H space 1 cross times 10 to the power of negative sign 5 end exponent end style 

Jawaban:

begin mathsize 14px style C H subscript 3 C O O Na end style merupakan garam basa karena begin mathsize 14px style C H subscript 3 C O O Na end style berasal dari kation basa kuat dan anion asam lemah. 
 

  • Menghitung begin mathsize 14px style open square brackets O H to the power of minus sign close square brackets end style:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell open square brackets O H to the power of minus sign close square brackets end cell equals cell square root of K subscript w over K subscript a cross times open square brackets C H subscript 3 C O O Na close square brackets cross times valensi end root end cell row blank equals cell square root of 10 to the power of negative sign 14 end exponent over 10 to the power of negative sign 5 end exponent cross times 10 to the power of negative sign 1 end exponent cross times 1 end root end cell row blank equals cell square root of 10 to the power of negative sign 10 end exponent end root end cell row blank equals cell 10 to the power of negative sign 5 end exponent end cell row blank blank blank end table end style 

 

  • Menghitung pOH dan pH begin mathsize 14px style C H subscript 3 C O O Na end style:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row pOH equals cell negative sign log space open square brackets O H to the power of minus sign close square brackets end cell row blank equals cell negative sign log space 10 to the power of negative sign 5 end exponent end cell row blank equals 5 row blank blank blank row pH equals cell 14 minus sign pOH end cell row blank equals cell 14 minus sign 5 end cell row blank equals 9 end table end style 


Jadi, pH larutan begin mathsize 14px style C H subscript 3 C O O Na end style adalah begin mathsize 14px style 9 end style.

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